Are you using hydraulic brakes yet or are you still on good old-fashioned cables? Let us know in the comments below! 👇
@LaurentiusTriarius7 ай бұрын
On one of my road bike yes, I wish there was an inexpensive cable actuated hydraulic system for MTBs...
@simonm14477 ай бұрын
On some simpler bikes and on classic mountainbikes - rim brakes. On the more modern bikes, the modern mountainbike and on the commuter - hydraulic disc brakes I have one GT Avalanche 3 with mechanical disc brakes, I kept them (Tektro IO) since they were original on this semi classic mtb but they do not nearly have the performance of a hydraulic disc brake
@Alex-ph4iu7 ай бұрын
I've been using mt200 for 7 years now, bled them 4-5 times during this period, but for the last 3 years i feel a big loss of power in rear brake (pads are new, rotor clean, oil is new too). Maybe it's time to change brake lever? I even thought about returning to cable type brake...
@simonm14477 ай бұрын
@@Alex-ph4iuOver time the 200s can get play in the lever bolt too. However in EU you get a full set for one axle for 25 € and a caliper for under 10 €
@GenePavlovsky4 ай бұрын
@@Alex-ph4iu Usually you can rebuild the master cylinder (the hydraulic device inside the brake lever) by replacing the seals or the entire plunger assembly. Provided that you can find the spare parts (lever rebuild kit). There's also a possibility that the caliper pistons are not moving freely due to corrosion. Caliper rebuild kits (piston+seals or just the seals) are also available. The above is based on my experience working with cars and motorbikes. On a bicycle you have an advantage of easily being able to upgrade your brakes by replacing them with a newer and better model.
@ThunderStruckMTB7 ай бұрын
I'm just gonna be that guy.... 1) Before pushing the caliper pistons back into their bores you need to open the lever and install the bleed cup so that the fluid has somewhere to go, otherwise you risk tearing the delicate diaphragm in the lever and fluid WILL squirt out from the lever vent port. Shimano has updated their latest dealer manuals to say exactly this. 2) Why push all of the filthy fluid from the caliper to the lever? Do a quick gravity bleed/fluid replacement to get that filthy fluid out of the caliper first before doing any bleeding from the bottom up.
@a8f2357 ай бұрын
Yeah, I did find this video a bit rough around the edges. The other thing is to clean the pistons before pushing them in as well.
@woduk7 ай бұрын
surprised people don’t already do that. Even on my hope brakes you take the rubber diaphragm off and the reservoir top cap.
@nathanroberts49353 ай бұрын
Hmm so you have to waste new oil to put in the container only to contaminate it with old oil? Seems a waste
@BeniKenesei7 ай бұрын
Like others said, if you press the pistons back with the bleed screw still installed in the lever, you have a pretty big chance of wrecking your shimano levers. For older shimanos and other brakes it's usually not an issue. Just install the funnel with or without oil on the lever as the first step!
@kevinwmitchell57737 ай бұрын
I appreciate all the helpful content you folks provide but I have to say this how to isn't one of your best. Most notably, you provide no comment or instruction on bleeding the syringe hose of air before attaching to the caliper. Around 5:23 you can see the hose attached, with an air void in the hose and the hose oriented in a vertical direction. Once you start injecting mineral oil into the caliper, this air is going to be pushed in first. Yes on a front caliper you probably will push this air all the way through to the collection cup. But on rear calipers where the hose routing sometimes has a number of bends, you are potentially adding air into the system that could be a bitch to bleed out. Also, after closing the bleed port on the caliper, almost all Shimano brake bleed instructions advise cycling the brake lever repeatedly, until no more bubbles exit into the bleed cup. You don't cover this.
@hifiandmtb7 ай бұрын
Agree. And when the pads are put back on there no mention of cycling the lever to get the pads to the correct bite point. Or rechecking pad rub on the disc. You always need to muck about a bit with caliper positioning as the pistons rarely work perfectly symmetrically.
@tsops227 ай бұрын
I find tapping the hoses a bit at the end to get rid of any cheeky final bubbles helps also. Great vid, thanks as always for all your efforts!
@FOTB4077 ай бұрын
Disconnecting the calipers from their mounts and letting them hang down vertically is best ime (particularly the rear, front is already vertical when mounted). Have a stool or something for caliper to sit on
@buffalobilly60464 ай бұрын
Nope and nope. Old wives tales. Same for disconnecting calipers. I’ve done this a dozen times it takes me five minutes I don’t disconnect anything and my brakes work perfectly every time.
@pontap906 ай бұрын
If you follow the steps but can't push oil through, it can be that you need to screw the lever adjustment back a bit again. I just encountered this issue.
@kurtismckemmie48505 ай бұрын
The brake bleed kit I bought from dyisland the instructions say to screw the pin in to close the line before adding fluid. I was very curious about the pin next to the lever as I had a mess of mineral oil all over the cables.
@JoelZieve7 ай бұрын
Why not do a gravity bleed?
@muppet4007 ай бұрын
@gmbntech. Thanks for this great vid. It’s about the only one I’ve seen that tells you to adjust the reach and bite point first. Was never sure before. Great content as always.
@MrDstnyw7 ай бұрын
I use green citroen lhm mineral oil works fine bet there are a ton of reasons why i probly shouldnt
@simonm14477 ай бұрын
At least it's still mineral oil. What is important not to use Dot fluid in mineral oil brakes or the other way, since the rubber of the O rings is made to withstand Dot or mineral oil, but these are different sorts of rubber
@MrDstnyw7 ай бұрын
@@simonm1447 exatly what i thaught, lhm is way cheap but still good quality so inclined to bleed more regular the viscostity seems very similar performance wise highly recomed it genuine total lhm+
@lewisjacksonv4 ай бұрын
What a great tutorial! Easy to follow and understand. Asset to gmbn!
@Themilkmanskid.5 ай бұрын
Seen other vids where they push fluid from bottom to top to clean the line, then draw in fresh fluid from the funnel at the top.🤷 I like this vid better and will try this way.
@UltraBiPolar3 ай бұрын
@@Themilkmanskid. 100% agree. We tried that other method and ended with wasted oil. We followed this video, which was much easier, and the results were perfect. As others have noted, take your time and go easy when injecting the oil to not ruin any fragile seals. If oil isn’t moving, stop and reassess.
@Themilkmanskid.3 ай бұрын
@@UltraBiPolar Bleeding is the easy part.
@Paul_19702 ай бұрын
I'm a newbie, doing maintenance on my bike, I'm having trouble with my brakes. After pulling my brake lever, the pistons on the caliper stays out and coursing my pads to rub on the discs . Any advice would be grateful. Thank you in advance
@spencerimreАй бұрын
look up how to clean the pistons, there should be a park tool video on it
@BeyReaper7 ай бұрын
Is the process the same for Sram? Actually Magura, bc thats whats on the bike I just bought. If they're not the same can you make a video on that or can someone link a good video on it?
@simonm14477 ай бұрын
I used the old mineral oil the last time to clean chains. If you put it into a plastic bottle with a big lid you can put the chain in and shake it (don't do it with glass bottles since they can break - don't ask why I know this). The oil cleans the chain and lubricates it at the same time. After some time the dirt settles on the ground of the bottle and the oil can be used to clean more chains
@dannyk37187 ай бұрын
great explanation and walk through thanks
@my50bikeАй бұрын
Thanks - Easy Az with this great video...
@rolandegyed66957 ай бұрын
A question, maybe a dumb one (I recently upgraded from v-brakes to hydros, so I don't know everything yet): why do you need to pour mineral oil into the syphon on top? Isn't that just for collecting the old oil?
@robertbransby7 ай бұрын
Sometimes the syringe can drag a little back when you open the bleed nipple, saves dragging air into the system from the top
@LaurentiusTriarius7 ай бұрын
On pretty much all the dirtbikes I had the fluid is not that nasty when I bleed them mid or off season (about every 6 months) but when I had Shimano brakes I bled them like every 2-3 months and the fluid was ALWAYS nasty, like brown/black. Why is that?
@andyrogers7477 ай бұрын
“…but the brake fluid” - lmao 👏
@No_ReGretzkys9923 күн бұрын
Will this method work with tektro m275 hydros??
@flyingdumbo767 ай бұрын
you are the best guys
@SCRAPSTrash7 ай бұрын
@gmbntech Air in the syringe when it's filed with oil. Is this an issue? Or will the air in the syringe cycle through the system with out worry of trapping air inside the brakes?
@mattgies7 ай бұрын
Just stop pushing on the syringe before the air gets to the tip. Easy enough if you keep the syringe vertical.
@antc50107 ай бұрын
Keep the syringe vertical with the plunger at the top and the outlet hose at the bottom.
@GenePavlovsky4 ай бұрын
@@antc5010 Or you can get rid of the air in the syringe/hose during filling it, and not run the risk of introducing an unnecessary bubble into the system.
@1997243 ай бұрын
My bleed nipples just leak all the fluid out when I brake after bleeding. Exact same issue in both front and rear. Very frustrating. Yes of course I tightened the nut again.
@plainuser485967 ай бұрын
Any reason why this is better or more preferable than gravity bleed?
@aftondanforth73877 ай бұрын
bc air goes up but it sometimes helps to do a gravity bleed first, then push new fluid up and do a lever bleed.
@LowFrequencyJim5 ай бұрын
I though you were supposed to pull the old fluid out from the caliper side as contaminated fluid can ruin the levers?
@gmbntech5 ай бұрын
Shimano's have always bled this way, dirty fluid will get purged at the top so you don't have to disconnect and refill a syringe with clean fluid.
@thisone-o6o2 ай бұрын
Is there a machine that could add the hydraulic fluid and remove any trapped air?
@TheiliteritesbianАй бұрын
Yup - ur hands
@ChrisRufus767 ай бұрын
Where is the video for Tekro Hydraulic Brakes, the most common brake on budget bikes sold?
@tomekborucki11207 ай бұрын
The most common ones are shimano mt200.
@hsmythi25 күн бұрын
Pro tip: before removing the funnel, put the wheel back and push the brake lever few times.
@johndef50757 ай бұрын
Can I use an old rotor as a pad spreader?
@simonm14477 ай бұрын
yes, of course
@byeboy007 күн бұрын
It’s not I’ve bled my brakes this way and the proper way and my brakes are still spongy it’s starting to piss me off 😅 nothing works
@eliascly23666 ай бұрын
Cheers!
@mano80337 ай бұрын
Let's do a TRP after this one
@2sweetpaul7 ай бұрын
Baby oil 😂
@bhe9152 ай бұрын
It is not fluid dynamics it is fluid mechanics.
@paulv222 ай бұрын
Shimano specifically states their mineral oil hydraulic fluid isn't corrosive.
@minethegap5 ай бұрын
Why would you pour fresh mineral oil into the reservoir and contaminate it with the flush from the bottom up. This video has a few fundamental errors that need revised. You can’t force pistons back if the reservoir is shut. The o rings on The piston will fail. Great video but do it again. This technique really only eradicates air bubbles not contaminants and moisture.
@gunstargizmo2 ай бұрын
This isn’t for someone who hasn’t done this before. Lacks steps.
@tollavАй бұрын
I would say this is very complete and easy to follow???
@spikeymike2677 ай бұрын
Marshy gravity bleed every time
@s_university_blvd5 ай бұрын
fuckingham palace
@stokedonearth50974 ай бұрын
just pour your old oil into the ocean. the sea animals love it.
@kona01977 ай бұрын
What is with GMBN always mispronouncing the word "Lever" ?
@adrianrogers69765 ай бұрын
Because we are English and pronounce it the correct way
@dominiqued.23075 ай бұрын
This is a really bad instruction video. At 5:25 they don't show properly how to connect the syringe. This other GMBN video explains it way better and in real time, they don't skip the difficult steps: kzbin.info/www/bejne/fpjKh2h4e7mFrZosi=gjCSM4lpcno18QJX They explain way better how to connect the syringe and avoid air bubbles in the other GMBN video.
@satchmotionrc82027 ай бұрын
Should make a video how to bleed mechanical disc brakes 😉
@RoyalKyleBarker7 ай бұрын
So much of this is wrong / not recommended. These clowns are getting view-hungry in my opinion.
@AA-dp1iy5 ай бұрын
Please don't read it, it's that simple
@MrSupermugen7 ай бұрын
How many times is this channel going to rinse and repeat videos? every new tech host has done it.... GMBN is such crap now
@ArkUSAbikerchick7 ай бұрын
I thought this one was a little more detailed and each step had close up pictures. A little easier for me since I have not done this before, but I feel like I can do it now. And the brakes look to be the same model as mine too! I thought it was improved! 👍
@MrSupermugen7 ай бұрын
@@ArkUSAbikerchick pick any of the previous 10 videos.
@Justin-ny6un7 ай бұрын
@@ArkUSAbikerchickIt’s missing about 3/4 of the bleed process steps. From what I remember Henry’s video is the correct process
@dc29273 ай бұрын
I am a newbie, but why do you need to take the wheel off and pads out (I understand why the spacer is needed after tha)
@lunarstorm273 ай бұрын
@@dc2927 it is just to avoid the risk of spilling the brake fluid on the brake pads. With care it is unnecessary.
@John3-16Clothing7 ай бұрын
First
@gmbntech7 ай бұрын
🥇
@mattgies7 ай бұрын
You've contributed nothing and patted yourself on the back for it. Great work!